Why do some people still deny that climate change is affecting the planet?

Because acknowledging that it is happening means accepting that you have to make changes and sacrifices to your lifestyle in order to do something about it, and a lot of people would rather cling to comforting delusions that allow them to cop out of taking such action! There has been a lot of misinformation in the press, some of it absolutely infantile, almost as if they are deliberately confusing 'climate' with 'weather'!